Gauge



April 15, 1930. P. E. PULVERMAN GAUGE Filed Dec. 22, 1922 29m/Mw.,

' a receptacle, p p v be cheap to manufacture; which thel parts f larg'ed scale,

sieeve. Y

Patented Apr. 15, T1935()` c 'A yIIEVHILP E. PULVERMAN, 0F

*y GAUGE' Animanga fried December 22,1922." semi no. .6081,388.

'The invention i relates to measuring and registering gauges, and moreparticularlyto Ydevice'sfor measuring A and registering pneumatie pressure. 1 The invention isillu-strat-ed and describedfingconnection with the Y usual in-flating and deflating valve of a pneumaticV tire, but theinvention 'is not limited to such use. L Y l Y The objects of the invention are to provide a device ofthe character described which will ind-icateat all times thepressure within such as atire tube; which will need'not be machined and fitted to r form perfeet joints; which lwill not easily get Out of order; lin ,wh-ich .the roperating partsv maybe completelyass'embledbefore beingl placed in yoperative position; in whi'chthe'. device may easily be tested and the tension of itsweigliing spring adjusted without dismantling the device, and in which wear of the numberv of .parts will be reduced toa minimum. l

'Theseand further objects will-more fully appear in the following specification and accompanying drawings, considered together Vor separately.

One embodimentxof the invention is illustrated in tlieaccompanyingn drawings, in which like parts in allot .the several figures areV designated by correspondingv charactersV` .ofrefeience, and in which Y 1 Y lFig. 1 Ais a longitudinal section ofthe. in'- vention employed in conjunctionfwith a pneumatic'tire valve.r Fig. Q'is a transverse ksection on the line .A Fig. Sis a detail side elevation, en .an enofzfaportion of van indicator Fig. Llisa bottomV view of the same. y Y' Fig. 5 isa. detail sectional view-illustrating a modified form oftensioning device.

Fig. 6 vis a side'elevation of a .teifisionV adljusting sleeve, Vand n y Fig. 7 .'s a detailsectionaliview of a modifled'form of spring securing means.

In the embodiment ofthe inventionvillus- V"trated 7 :indicates the'tubular body portion; yef a tire valve, havinga flange Sbetween Lwhich and a washer i9 the body isv secured to la tire'tube `1.0 whereby communication with' Nnwyonn, In; Y., Assieme. To THE visonnrnneonronaaien, en new Yoni,i\i. Y;

Vthe-tire tube may be established. V.The bore 1l l of the tube 7 is cylindrical for most Yof its ,length but at the inner endV the same isV counterbered to Vforma conical chamber 12,an.d a groove 18 encirclesjthe inner edge ofthe 'counterbore Disposed within `tlieboize is a tubular 'plunger member 14 adapted to freely move l longitudinally ot the body. The outer .end of the plunger is provided with a threaded nipple to which ai dust vcap may beapplied,

as is usual, and within the bore of the plung-V er' is disposed a check; valve 15 by means of which air may be maintained inthe tire tub` `,f,

,and which maybe unseated to inflateor tedeflate the tire.

The lower end Lof. the plunger is lof 4-reduced diameterV to form la nipple 16.v The' Y .plunger is provided with alongitudinal key. way into which proj ects a key carried by the body. In the drawings the key is inthe forniL `of.a ..scr`ew 17., but it is to be understood Y that any other .form of key'inay 'beemployed to prevent. the rotation of the plunger in the,

body land prevent the removal of the plunger are of spiral form whereby 'the ange 'will forrmin effect, a female VScrewthread' 0f one turn. f

rjfllhe sleeve 18" is 'turned up at right angles to the body of the sheet, and the sheet' is rolled to form a hollow lpreferably `formed I of a vflat sheet of thin metalhaving onegof its edges inclined. The `said inclined edge lis" cylinderl with the iange extending inwardly.

TheY plunger 'is' inserted inthe sleeve, `and preferably the parts are soldered or Votherwise secu-red together. The length `of'jthe sheet'of which the sleeve is formed is less thaiithecircnnfiference lof the plunger `wheres4V bythe edgesQO 'ofthe .'sl'eeyeWillr'not'be'in ;g

8 is reduced in diameter as shown at 26, and

'inward movement of the plunger.

contact, and there will be formed a groove which will be coincident with the lreyway in the plunger. If desired the keyway-in the plunger may be omitted, and the key 17 may engage in the space between the edges 20 of the sleeve. The exterior surface of the sleeve 18 carries a scale or scales by means of which the pressure in the tire may be ascertained.

rlhe nipple 16 is inserted in one end of a longitudinally expansible tube 21, preferably of rubber, in any desired manner. The end of the tube 21 lies within the chamber formed by the projecting end of the sleeve. and any bulging caused by pressure of air in the tube will be within the chamber and rubber V`will not come in Contact with any portion. of

the device which is `movable relatively to the to a sleeve 23, similar to the sleeve 18, and` which is carried by and secured to a plug 24 seated in the inner end Vof the bore 11 of the body. The plug is provided with a nipple -25 to which the opposite end of the tube 21 is secured. The Vplug Vand its nipple are perforated longitudinally whereby air may pass the valve 15, through the plunger 14, tube 21 and plug 24 to the tire tube 10., That end of the plug opposite the nipple 25 is of conical form to lit within the conical recess 12, and solder is run into the groove 18'to secure the plug in place. The plug need not .form a tight lit in the bore, as the solder will retain it in place. .Y Y

That end of the body 7 opposite the angc said reduced portion is screwthreaded as screwed down on the dust cap nipple of the body 7 to engage theV thimble and limit the Y The device illustrated in Figs. 1, 2,13 and `4 is assembled as follows:

The valve mechanism 15 is positioned in the plunger 14 and oneV end of the tube 21 is wired to the nipple'16, and the sleeve 18 is applied toV the cylindrical surface of the plunger vwith'its longitudinal edges in parallel to the edges of the keyway. The spring V22 is passed over the tube and its end 1s `nipple 25; VThe sleeve 28 is now placed in position on the plug 24 andsolderedfor other..

wise secured in position.

The sleeve 23 isl Thevapparatus thus assembled is passed into the bore of the body 7 through the Vcounterbored end until the threaded nipple vthe sleeve 18 and the top of the chamfered end of the thimble;

The device is now placed on a testing table with thebore of the plugk 24 incomniunication with a source of air supply of known pressure, lbs. for example, andtheV air passing through the tube 21 vand the bore of the plunger will be prevented-'from escap-V ing )because of Vthe checlcvalve 15, and the plunger will be moved outward of the body.

Should the indicator'line below the numeral on the scale carried on the sleve 18V to indicate thelznown air pressure-in the present case 60 pounds-v-not register with the chamferedv end of the thimble 27 the operator will know that the weighing spring 22 is either fast or slow, as theindicator line is above or Vbelow the end ofthe thimble.V The thimble willpbe screwed down or up, as the Ycase may be until the said indicatorjline is level with the top of the thimble. The device is now calibrated, and preferably solder 30 is run inbet-ween the lower end of the thimble and the shoulder on the body. The solder will penetrate'between the threads of the thimble and the portion 26, and rigidly and permanently secure the thimble to the body.

The nut 28 may, if desired, be soldered to the plunger 14, and all parts of the device will be secured against tampering.v

In the modification illustrated in Figs. 5 and 6 the outer, reduced portion'of the body member 7SL is dispensed with and the end of Vthe bodyis count-erbored as at 7b. Acylindrical thimble 27a, the bore of which is the same as that of the body and'ha-ving an axiallyeXtending flange 27b is placed on the end of' the body with the flange. 27b resting in counterbore 7 b. i

lf, when the device is placed on the test table, the scale on the sleeve 18 doesY not indicate the known pressure, the nut is Vbacked off and a longer or shorter thimble is substituted, and whenA one the upper edge of which registers with the test pressure is posiationed, the Vsame .is soldered or otherwise secured to the end of the body, the nut is screwed home and if' desired soldered Vto the plunger,

and the gauge is ready for use. Y

InV the embodiment of the invention illus- Y tratedin Fig. 5, collar 28at may be' employed prevent the entr-ance oil air around vthe plug,

and all of thel air .entering or leaving. the tire l tube must pass through the tube 2l.

j tion of the sleeve Q3.

' `As shown in Fig.' 7, that portion oi the sleeve 18 which extends downward below the body of the plunger 14, and towhich the up'- per endv of thespring 22' issecured, extends 'below 'the lower endV of the nip-pleql. rIhis same-construction may be appliedt'o the plu-g 24 whereby the whole oi' the nipplev 25 will lie within the boundarieso'f the projecting 'por- The particular advantage vof this construcnon is ein ure active person of ai@ Springen,

that is the portion between thespiral flan-ges ofthesleeves 18 and'23, will bey shorter' than the portion ofthe tube 21 which lies between the endsy of the nipples l6' and 25, and the A 'active' portion of the spring will not contact f' with those portions of the tube which are elitended by the ,lips atl Vthe outer ends of the 'I "nipples l' he operation of the device is obvious from the above description.k v y 'In accordance 1 with the provisions of the patent statutes princi-ple. or" the-'invention has'been described, together with the apparatubular body.

tus which is now considered to represent the best embodiment thereof, but -it is desired to have understood that the apparatus shown is merely illustrative, and that the invention maybe carried outin other ways.

o The invention havingbeendescribed, what is claimed' and desired to besecured by Letters Patent, is

l. Apdevice of thecharacter described, coniprising a tubular body adapted to be secured at one end thereof to a container ai'rd to aord Vcoinmunibation with the interioif thereof, a plunger carried within the bore ol thebody, v said plunger projectingjfrom-one'end of the a col-lar on theprojecting end otthe plunger, and a thimble oarriedfon the body and adaptedtocoo-perate lwith the collar to' oi the plunger intoV 'theV limit the movement a A devies-0ftte-.femme VVdeserted,

comprising a tubularA body Vafd-apted 1tob'efseo cured atone end thereof toa container" and V- n vprisingrra body havingy a cylindricalfbore extendin vlongitudin'ally therethrough, a

lto aii'ord comm-u fication l withfthe" interiu'ir`r Y thereoi, a plu-nger carriedv within the boreof the bodyzand? adapted tof freely move" longi-vvv -tudinallyl thereof', saidplun'ger projecting from one endl of theibodyafcollalrfon' the proj ect-ing end ofthezplunger; a thimblehaving screwthreaded eng-agementfwith the "body and adapted to cooperatewith the'collar to limit the inoveinent'oi the plungerintoY the tubular body, and'meansfor permanentlyv securing the thimble tothe body. l x j f 3. A device of the character described, com-` prising a tubular body adapted for attachment at one end to and afford communication with a container, an' element within and capablo of'longitudinal movement relative ,to the'body, saidr element projecting from the free end of the body whereby pressure within the bodyV will move the Velement outwardly, 4a. sleeve secured to and surrounding the. element andprojecting from the inner end of the body j oi the element`,a .spring having one yend secured within the projecting portion of the sleeve, and means for securing the opposite end of the .spring within the inner end of thefbodyl whereby said spring will resist outward movement of the element. n

41A device of the'charaoter described, corrr- V .f

prisingatubular body' adapted for attachment at one end to'andaflord communication witha container, an elementwithin and oe-V pable of longitudinalniovement relativet vend secured'within the projecting vportion of the sleeve, and a plug having alongi-tudinal perforation and engaging they bore'. ofthe bodyv for yanc'horiirg ,the vopposite end of vthe spring to the inner V'end of the bodywhfereby; said spring will Yresist outward movement of the element." v

l. 5, A. device or" the character described, com! prising a.. vtubular body adapted kforattach;-

ment ati one end to vand` aiiord. communi-ca,- 'tion with. a container, an element withi-nand capable of Vlongitudinal movementfrelatveto the bod-y, said element projecting from the free end of the body whereby pressurewthin the body will move the element. outwardly, a

sleeve secured. to and surrounding the ele-'ment `and projecting from theinner end of thebody oi the element, a springha'ving one endsecured within the projecting portion of lthe sleeve, land. aplug having a longitudinal pen 'the' body, said element projecting .from the Y no Y oration and engaging the bore of the body L for anchoring the opposite end of the spring to the inner end of the body whereby said 6. A device of the character described, com;

plunger isposed within the bodyand ad'apt- A end. of the' body, meansfor securing the? plug in position, the opposed ends ofthe plunger,

and plug' being spaced. apartga* sleeve' sury rounding the plunger proj ectinggfrointhe 'innerendlthereof,y saidfsleevetorming part' of 1115 ,spring will resist outward movement. otk the v '.element, saidplug being. permanently secured the plunger, `a spiral bead carried by the sleeve and projecting inwardly toward the axis of the bore, a spiral spring, the bead engaging between the convolutionsV at one end of the spring, and means for securing the opposite end of the spring to the plug.

7. A device of the character described, coinprising a body having a cylindrical bore j extending longitudinally therethrough, a plunger disposed within the body and adapted to move longitudinally thereof,1one end of the plunger extending beyond an end of the body, a plug engaging within theroppositek end of the body, means for securingthe mem-- ber in position, the opposed ends of the plunger and plug being spaced apart, a sleeve surrounding the plunger and'projectingfrom the inner end thereof, said sleeve forming part Vof the plunger, a spiral bead'projecting inwardlyfrom the free end of the sleeve, a spi-ral spring, the bead engaging between the convolutions at one end of the spring, anda cylindrical tube surrounding the'plug and projecting from the inner end thereof, a spi# ral bead projecting inwardly from the free end of the tube, said bead engaging Ybetween convolutions at the opposite end of the spring.

8. A device of the character described, comprising a tubular body adapted to be attached at one end to and afford communication with a container, an element within the bore of the body and adapted to move freely longitudinally of the body, the element being re-V duced in diameter at its inner end to form a projecting nipple, a sleeve fitting the major portion of the outer cylindrical Vsurface of the element, said sleeve surrounding the elements projecting nipple and extendingbeyond its free end, an elastic tube connectedto the .nipf ple, and a coil spring side of the'sleeve. V Y

9. A device of the character described,com

prising a tubular body adapted to be attachedat one end to and adord communication with a container, an element within the bore of the body andadapted to move freely longitudi-V nally of the body, the element being reduced in diameterV at'its inner end to form a nipple,

a sleeve fitting the maj or portion of the outer Y cylindrical surface of the element, said sleeve y surrounding the nipple, anrelastic tube engaging and secured to the exterior surface of Y the nipple, and a spiral spring engaging within the sleeve. Y n

l0. A device ofthe characterdescribed,

comprising a tubular body, a plunger carried within and freely movable long itudi-V nally of the body, said plunger extending Abeyond one end `of the body, anv elastic device within the bore -ofthe body and attached to the plunger, said device being-'secured within j the body at a distance from the plunger and adaptedto oppose movement of theplungerV4 Vin the direction awayfrom theanchor, and

connected to the in- Y means for adjusting the indicator line of the device. i

11. A device of the character described, comprising a tubular body, a plungercarried within and freely movable longitudinally of the body, said plunger extending be yondvone end Vof the body, Van elastic device within the bore ofthe body and attached to the plunger, said devicebeing secured within the body at a, distance from the plunger and adapted to oppose movement ofthe plunger iii' the direction awayrfrom the securing means, and meansaccessible from the outside of the body for adjusting the indicator line ofthe device. Y

127A device of the character described, adapted to be attached at one end to and in communicationwith atire tube, comprising a tubular body, a plunger carried within and freely movable longitudinally of the body,

lsaid plunger extending beyond the opposite end of the body, a spring within the bore lof Vthe body and attachedto the plunger, said spring being secured within the'body in proximity to the point of attachment andadapted to oppose movement of the plunger in the direction away from the securing means, and

means carriedby the `unattached end of thek Y Vbody and cooperating with means carried by the plungerto limit the inward movement Yof the plunger, said means carried by the unattached end also serving to adjust the in dicator line of thedevice.

13, In Van instrument vof the character described comprising a plungerand a casing, adjustable means Vmounted on the plunger, and adjustable means mounted on the casing,

said meanslbeing adapted to cooperate to Ylimit the inward movement'of the plunger the Vi15-Y an adjustable nut carried by said plunger andl Y van, adjustable thimble carried by said casing,-l whereby,thetwoxcooperate to limit the invward 'movementV of the Vplunger within Vthe casing said thimble Valso servingtoadjust the indicator line `of the device. i

This,specificationrsigned and witnessed this i Y 20th day of December, 1922. Y

fPHiLir E. PULVERMAN. 

